TM 5-6675-328-14
GLOSSARY - Cont
ABBREVIATION/TERM .......................................................................... DEFINITION
Plunge .................................................................................................... Rotation of optical sighting telescope
............................................................................................................... 1800in vertical plane.
Rectifier .................................................................................................. Device for converting alternating current
............................................................................................................... into direct current.
Reference Line........................................................................................ Line of sight from which measurements are
............................................................................................................... made.
Tangent Screw ........................................................................................ Hand-operated screw which changes direction
............................................................................................................... of line of sight either in azimuth or in
............................................................................................................... elevation.
Telescopic Sight...................................................................................... Optical system that consists of objective
............................................................................................................... lens and focusing device that forms image
............................................................................................................... on cross-line reticle which is viewed
............................................................................................................... through eyepiece that magnifies image and
............................................................................................................... cross-line together.
Vertical.................................................................................................... In direction of gravity.
Glossary 2
